Effects of Draft Tubes on Particle Velocity Profiles in Spouted Beds

2006 ◽  
Vol 29 (7) ◽  
pp. 875-881 ◽  
Author(s):  
X.-L. Zhao ◽  
Q. Yao ◽  
S.-Q. Li
Keyword(s):  
Particle Velocity ◽  
Velocity Profiles ◽  
Spouted Beds ◽  
Draft Tubes

Particle velocity profiles and solid flow patterns in spouted beds

1994 ◽  
Vol 72 (4) ◽  
pp. 561-568 ◽  
Author(s):  
Y.-L. He ◽  
S.-Z. Qin ◽  
C. J. Lim ◽  
J. R. Grace
Keyword(s):  
Particle Velocity ◽  
Flow Patterns ◽  
Velocity Profiles ◽  
Solid Flow ◽  
Spouted Beds

Operating and Peak Pressure Drops in Conical Spouted Beds Equipped with Draft Tubes of Different Configuration

2013 ◽  
Vol 53 (1) ◽  
pp. 415-427 ◽  
Author(s):  
Haritz Altzibar ◽  
Gartzen Lopez ◽  
Javier Bilbao ◽  
Martin Olazar
Keyword(s):  
Peak Pressure ◽  
Pressure Drops ◽  
Spouted Beds ◽  
Draft Tubes

scholarly journals Particle Velocity Profiles in Underwater Horns

1971 ◽  
Vol 49 (1A) ◽  
pp. 90-91
Author(s):  
T. D. Mathis ◽  
R. D. Finch
Keyword(s):  
Particle Velocity ◽  
Velocity Profiles

scholarly journals Effects of Riser Diameter on Solids Holdup and Particle Velocity Profiles in Circulating Fluidized Bed Riser Systems

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Ronald W. Breault ◽  
Steven L. Rowan ◽  
Justin M. Weber ◽  
Jingsi Yang
Keyword(s):  
Fluidized Bed ◽  
Particle Velocity ◽  
Circulating Fluidized Bed ◽  
Velocity Profiles ◽  
Small Scale ◽  
Sauter Mean Diameter ◽  
Particle Size Range ◽  
Cold Flow ◽  
Solids Holdup ◽  
Radial Profiles

Abstract Tests were performed in a 0.1-m diameter small circulating fluidized bed (SCFB) and 0.3 m diameter cold flow circulating fluidized bed (CFCFB) riser systems located at the National Energy Technology Laboratory (NETL) to study the effects of riser diameter on the riser hydrodynamics. These tests were performed at solids circulation rates of Gs = 20 and 75 kg/m2 s and superficial gas velocities of Ug = 5.8 and 6.5 m/s using high-density polyethylene (HDPE) pellets with a density of 0.863 g/cm3, particle size range of 600–1400 µm (with a Sauter mean diameter of 871 µm, placing them in the Geldart B classification). Comparisons of riser axial pressure and solids fraction profiles, radial particle velocity profiles, and radial profiles of higher statistical moments and select chaos analysis parameters were considered. The results showed that for a given Ug and Gs, the smaller diameter riser exhibited characteristics associated with more dilute solids flow than that observed in the larger diameter riser. Additionally, the larger diameter riser exhibited a downward flow of solids near the wall under all test conditions, whereas the smaller diameter riser data exhibited little or no indications of solids downflow near the wall. These findings suggest that, from an industrial standpoint, a direct scaleup of small-scale tests cannot readily be accomplished as the solids holdup and the solids velocity profiles in small units (those normally tested in the laboratory) are not similar to those of large units and the performance of large units can therefore not be predicted from small-scale tests.

scholarly journals CFD-modeling of effects of draft tubes on operating condition in spouted beds

2013 ◽  
Vol 37 (4) ◽  
pp. 1851-1859 ◽  
Author(s):  
S. Moradi ◽  
A. Yeganeh ◽  
M. Salimi
Keyword(s):  
Cfd Modeling ◽  
Operating Condition ◽  
Spouted Beds ◽  
Draft Tubes

Minimum Spouting Velocity of Conical Spouted Beds Equipped with Draft Tubes of Different Configuration

2013 ◽  
Vol 52 (8) ◽  
pp. 2995-3006 ◽  
Author(s):  
Haritz Altzibar ◽  
Gartzen Lopez ◽  
Javier Bilbao ◽  
Martin Olazar
Keyword(s):  
Spouted Beds ◽  
Draft Tubes

scholarly journals Bed symmetry in the fountain confined conical spouted beds with open-sided draft tubes

2021 ◽  
Author(s):  
Mikel Tellabide ◽  
Idoia Estiati ◽  
Aitor Atxutegi ◽  
Haritz Altzibar ◽  
Javier Bilbao ◽  
...  
Keyword(s):  
Spouted Beds ◽  
Draft Tubes
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